Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:14 2012

Optimize a model with 1 rows, 54 columns and 54 nonzeros
Model has 68 quadratic objective terms
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 69 rows, 121 columns, 257 nonzeros
Variable types: 0 continuous, 121 integer (120 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0    0.00000    0   20   25.00000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   15   19.00000    0.00000   100%     -    0s
H    0     0                      12.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   17   12.00000    0.00000   100%     -    0s
     0     0    0.00000    0   17   12.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   17   10.00000    0.00000   100%     -    0s
H  133    62                       8.0000000    0.00000   100%   5.6    0s
H  136    49                       7.0000000    0.00000   100%   5.5    0s
*  214    31               9       6.0000000    3.00000  50.0%  10.9    0s

Cutting planes:
  Cover: 125

Explored 246 nodes (3026 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%